The objective of this study was to evaluate fish passage efficiency, based on fish-trap monitoring methodology, in the fishway of Seungchon Weir, which was constructed on the lower region of Yeongsan River in 2011. Seasonal patterns and diel variations of fish movements, fish fauna, and compositions in the fishway were analyzed in relation to the current velocity and location of the trap-setting in the fishway. For the analysis, we conducted seven times surveys in 2012 on the fishway and also conducted intensive monitoring of the fishway as 3 hrs interval for the diel variations of fish fauna and compositions in the fishway. According to the fish-trap monitoring methodology, the total number of fish species was 13 species, which was a 43.3% of the total. Most dominant fish used the fishway was Squalidus chankaensis tsuchigae and the relative abundance of the species used the fishway was 33.5% of the total. The season and time zone (in diel variation) observed most frequently in the fishway were July and 18:00-21:00 PM, respectively. The fish movements and use-rates of fishway varied depending on the locations of trap-setting; Fish biomass and the number of species were statistically (p < 0.05) greater in the most right or left-sided traps than in the mid-traps. Also, fish movements and use-rates of fishway were influenced by current velocity on the fishway; fish in the fishway preferred the low current velocity (mean 0.71 m/sec) than the high current velocity (mean 1.13 m/sec). Further long-term studies should be monitored for the efficiency evaluations of the fishway.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 조사 대상지 현황
  2.2. 승촌보 어도에서의 어류 모니터링 방법
  2.3. 어도 이용특성 분석을 위한 통계 분석
 3. 결과 및 고찰
  3.1. 승촌보 어도에서 유속 분포특성
  3.2. 승촌보 어도의 어종구성비 및 분포 특성
  3.3. 승촌보 어도의 일주기 시간대별 어류 이용도
  3.4. 어도의 트랩(Trap) 위치별 어류의 이동현황
  3.5. 어도의 유속 분포 특성에 따른 어류 이동성
  3.6. 승촌보 어도에 대한 종합적 고찰
 참 고 문 헌

• 최지웅(충남대학교 생명시스템과학대학 생물과학과) | Ji-Woong Choi (Department of Biological Sciences, College of Biosciences and Biotechnology, Chungnam National University)
• 박찬서(충남대학교 생명시스템과학대학 생물과학과) | Chan-Seo Park (Department of Biological Sciences, College of Biosciences and Biotechnology, Chungnam National University)
• 안광국(충남대학교 생명시스템과학대학 생물과학과) | Kwang-Guk An (Department of Biological Sciences, College of Biosciences and Biotechnology, Chungnam National University) Corresponding author
• 임병진(국립환경과학원 영산강물연구소) | Byung Jin Lim (Yongsan River Environment Research Center, National Institute of Environmental Research)
• 박종환(국립환경과학원 영산강물연구소) | Jong-Hwan Park (Yongsan River Environment Research Center, National Institute of Environmental Research)